spatial coordinate
91Irish Transverse Mercator — (ITM), is the new geographic coordinate system for Ireland. It was implemented jointly by the Ordnance Survey of Ireland (OSI) and the Ordnance Survey of Northern Ireland (OSNI) in 2001. The name is derived from the Transverse Mercator projection …
92Shape of the Universe — Edge of the Universe redirects here. For the Bee Gees song, see Edge of the Universe (song). The local geometry of the universe is determined by whether Omega is less than, equal to or greater than 1. From top to bottom: a spherical universe, a… …
93Stereotactic surgery — or stereotaxy is a minimally invasive form of surgical intervention which makes use of a three dimensional coordinates system to locate small targets inside the body and to perform on them some action such as ablation (removal), biopsy, lesion,… …
94Observer (special relativity) — The term observer in special relativity refers most commonly to an inertial reference frame. Less often it may refer to an arbitrary non inertial reference frame; in particular, a Rindler frame is sometimes called an accelerating observer . In… …
95Newtonian motivations for general relativity — Some of the basic concepts of General Relativity can be outlined outside the relativistic domain. In particular, the idea that mass/energy generates curvature in space and that curvature affects the motion of masses can be illustrated in a… …
96theatre — /thee euh teuhr, theeeu /, n. theater. * * * I Building or space in which performances are given before an audience. It contains an auditorium and stage. In ancient Greece, where Western theatre began (5th century BC), theatres were constructed… …
97relativistic mechanics — ▪ physics Introduction science concerned with the motion of bodies whose relative velocities approach the speed of light c, or whose kinetic energies are comparable with the product of their masses m and the square of the velocity of light …
98Maxwell's equations — For thermodynamic relations, see Maxwell relations. Electromagnetism …
99Fourier optics — is the study of classical optics using techniques involving Fourier transforms and can be seen as an extension of the Huygens Fresnel principle. The underlying theorem that light waves can be described as made up of sinusoidal waves, in a manner… …
100Time standard — A time standard is any officially recognized specification for measuring time: either the rate at which time passes; or points in time; or both. For example, the standard for civil time specifies both time intervals and time of day. A time scale… …
